LED Street Lamp Base

ABSTRACT

The present invention relates to a LED street lamp, which consists of power source box at front section, lamp holder at middle section and end cap at end section. The above mentioned lamp holder is composed of turnable framework, frame fixing unit connected with frame to limit frame rotation and several LED lighting modules installed side by side in the frame. A LED lighting module can be turned to connect with frame on which module positioning unit is set to limit the rotation of LED lighting module. For LED street lamp base of the invention, the major design part contains two bilateral symmetrical frames each of which is set with several LED lighting modules side by side. Both angles of frame and LED lighting module are adjustable of strong practicality, and so we can adjust them at any time according to practical street situation in order to ensure ideal street lighting brightness and evenness.

FIELD OF THE INVENTION

The present invention generally relates to street lighting, especially a framework to fix LED lighting module and a street lamp base of which the angle of LED lighting module can be adjustable.

BACKGROUND OF THE INVENTION

As the major application of semi-conductor lighting, LED street lamp features in long service life, strong mist penetration, and, more importantly, more energy saving than traditional street lamp.

For the shortage of LED in optical performance, if you want to set LED light source on traditional lamp, it can only be done during the period of manufacture that is to carry out light distribution design according to the specific street lighting situation, namely to design lighting direction of each or each group of LED lamp, to light different street area and gain the overall lighting effect; the above mentioned street lamp can only be suitable for specific street lighting and each or each group of LED light towards fixed directions, so the lighting angle cannot be adjusted to fit for other street lighting for certain limitations.

SUMMARY OF THE INVENTION

The invention provides a LED street lamp base that can adjust lighting angle according to street situation against the existing shortage.

Technical scheme of the invention is carried out as follows:

A LED street lamp base consists of power source box at front section, lamp holder at middle section and end cap at end section. The above mentioned lamp holder is composed of turnable framework, frame fixing unit connected with frame to limit frame rotation and several LED lighting modules installed side by side in the frame. A LED lighting module can be turned to connect with frame on which module positioning unit is set to limit the rotation of LED lighting module.

As a preference, the described lamp holder mentioned above consists of two frames 22 bilateral symmetrical along the central line of lamp holder and connecting piece used to connect two frames; the front and back ends of connecting piece are fixed and connected respectively with power source box and end cap, and; inside of frame can be turned to connect with connecting piece while outside of frame is connected to frame positioning unit.

As a preference, the above mentioned frame includes left side plate, right side plate, and front side plate and back side plate used to connect left and right side plates. Both ends of LED lighting module can be turned to connect with the above mentioned left and right sides plates. Several spindle holes are set on the same line to mount LED lighting module while several lead holes are set on right side plate corresponding to spindle holes on left side plate for lead to go through. The right side plate is of arc shape, and the top and bottom ends of joint between front side plate and right side plate are set with grooves the same as that on the top and bottom ends of joint between back side plate and right side plate.

The mentioned connecting piece is hollow profile including sub-plate and two bilateral symmetrical support plates at both ends of subplate that match with right side plate of frame and are used to support right side plate and enable it to turn in support plate; holes matching with lead holes on right side plate of frame are set on support plate while subplate and two support plates form a cavity to hold lead; both top and bottom ends of support plate are open with positioning slots along their own length direction and support rod goes through it with both ends respectively connected with power source box and end cap. The width and depth of grooves on the front and back side plates determine the turning angle of right side plate of frame.

As a preference, the right end of LED lighting module is set with bulb from which lead is drawn out, and; the left end of LED lighting module is fixed with a circular ring of which the top and bottom ends on outer circumference are respectively set with a elastic convex tooth to connect module positioning unit. Bulb can turn freely to meet the demand of LED lighting module to turn in circumference direction and can be positioned when stopping turning with the help of module positioning unit.

As a preference, the mentioned module positioning unit includes clamp ring that is socketed out of circular ring and there is a ledge in middle part of clamp ring while spindle nose is set on the middle part of ledge and inserted into spindle hole of left side plate; the up and down ends of inner surface of clamp ring are respectively set with a row of internal teeth; elastic convex teeth are geared with the mentioned internal teeth; clamp ring is connected with left side plate through slide block and sliding rail, and the periphery of clamp ring is fixed on left side plate; when big stress is laid between elastic convex teeth and internal teeth, elastic convex teeth can slide relative to internal teeth. LED lighting module is inserted in circumferentially fixed clamp ring through a circular ring and elastic convex teeth at outer circumference of circular ring is geared with internal teeth at inner circumference of clamp ring. To adjust lighting angle of single LED lighting module, LED lighting module can be turned to make elastic convex teeth to slide in internal teeth under stress from one tooth slot to another one; when angle is adjusted well, stop turning and elastic convex teeth will be locked in tooth slot between internal teeth and LED lighting module will stop at corresponding position. For another adjustment, the above mentioned operations can be repeated. At initial situation, clamp ring shall be mounted one by one on left side plate and slid to corresponding position and then insert circular ring on LED lighting module into internal circumference of clamp ring to prevent circular ring being inserted too deep resulting in poor touch between convex teeth and internal teeth. Ledge is set in middle part of clamp ring to limit the position of circular ring and it is set with spindle nose that is inserted in spindle nose on left side plate in order to in favor of LED lighting module turning smoothly and to limit clamp ring in corresponding position so as to prevent it sliding on left side plate.

As a preference, the up and down ends on periphery of clamp ring are set with sliding plates parallel to each other on which raised slide block is set; the internal side of left side plate is set with cavity to hold clamp ring while up and down ends of it are respectively set with 1 slide rail in which the slide block mentioned is set. Two parallel sliding plates are in touch with up and down ends of cavity to prevent clamp ring from circumferential turning, and slide block is set in slide rail to prevent clamp ring dropping from cavity.

To better bear bulb and to enable bulb to turn more freely, as a preference, the top and bottom edges of right side plate is correspondingly opened with arc groove to hold bulb and enable bulb to turn in it. Bulb of LED lighting module is set in arc groove mentioned above while lead goes through the through-holes and holes above mentioned.

As a preference, the LED lighting module mentioned above consists of radiator unit and heat conduction subplate of which top surface is to connect with radiator unit and bottom surface is set with print circuit and several LEDs. Circular ring and bulb are respectively set on left and right end faces of radiator unit. LED lighting module is an overall modeling including several LEDs forming a lighting tube that features in easy maintenance and replacement as well as good light concentration effect.

As a preference, radiator unit mentioned above includes baseplate of which bottom face is connected with top face of heat conduction subplate and top face is set with several fins side by side along the width direction of baseplate and vertical to baseplate.

As a preference, fins are made from a single piece together with baseplate that is convenient for radiation.

As a preference, elastic convex tooth mentioned above is made of a single piece together with circular ring, and both of them are made of rubber material. For rubber is soft, they can slide relative to internal tooth under big stress.

As a preference, frame positioning unit includes frame positioning plate set on the outside of frame and top of the frame positioning plate is hinged with power source box and end cap; end face on frame positioning plate in touch with frame is set with several parallel slots from up to down along horizontal direction, and; at least 1 strip matching with slot is set on end face of frame in touch with frame positioning plate to lock strip into slot. At initial situation, left side plate is in touch with frame positioning plate and strip is locked in slot. When to adjust frame angle, turn over frame positioning plate to break strip away from slot, and then turn frame for certain angle, namely right side plate turning certain angle in support plate; when angle is adjusted well, lay down frame positioning plate to lock strip into corresponding slot so as to locate frame.

As a preference, frame mentioned above includes left side plate, right side plate, and front and back side plates to connect left and right side plates. Strip is set on left side plate.

As a preference, frame positioning plate is set with 4 parallel grooves from top to bottom and a strip is set on top end of left side plate.

For LED street lamp base of the invention, the major design part contains two bilateral symmetrical frames each of which is set with several LED lighting modules side by side. Both angles of frame and LED lighting module are adjustable of strong practicality, and so we can adjust them at any time according to practical street situation in order to ensure ideal street lighting brightness and evenness.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1. Explosive view of LED street lamp base of the invention;

FIG. 2. Breakdown structure diagram of frame and connecting piece;

FIG. 3. Breakdown structure diagram of frame and frame positioning plate;

FIG. 4. Assembly structure diagram of connecting piece, frame and frame positioning plate;

FIG. 5. Assembly structure diagram of connecting piece, frame, frame positioning plate and end cap;

FIG. 6. Assembly structure diagram of frame and LED lighting module;

FIG. 7. Space structure diagram of LED lighting module of the invention;

FIG. 8. Plane structure diagram of undersurface of LED lighting module;

FIG. 9. Connection structure diagram of LED lighting module and right side plate, connecting piece and clamp ring;

FIG. 10. Enlarged view of Part A in FIG. 9;

FIG. 11. Connecting situation diagram of frame positioning plate before adjusting angle of frame;

FIG. 12. Situation diagram for frame breaking away from frame positioning plate after turning for certain angle when adjusting frame angle;

FIG. 13. Enlarged view of Part A in FIG. 7;

FIG. 14. Enlarged view of Part A in FIG. 11 after turning for 90° clockwise.

DETAILED DESCRIPTION OF THE INVENTION

Specific implementation way of the invention is as follows:

Example of implementation: as shown in FIG. 1˜6, LED street lamp base includes power source box 27 at front section, lamp holder 28 at middle section and end cap 29 at end section. Lamp holder 28 includes two frames 1 bilateral symmetrical along central line of lamp holder 28 and connecting piece 39 to connect two frames; the front and back ends of connecting piece 39 are respectively fixed and connected with power source box 27 and end cap 29 while the inside frame 1 can be turned to connect with connecting piece 39; the outside of frame 1 is connected with frame positioning unit to limit frame from turning while inside frame is set with several LED lighting module 2 side by side; LED lighting module 2 can be turned to connect with frame 1 on which module positioning module is set to limit LED lighting module 2 from turning.

The descriptions on parts and unit structure are as follows:

As shown in FIG. 2˜5, frame 1 consists of left side plate 3, right side plate 4 and the front side plate 5 and back side plate 6 to connect left and right side plates through screw; both ends of LED lighting module 2 can be turned to connect with left side 3 and right side plate 4; several spindle holes 21 are set along the same line on left side plate to mount LED lighting module 2 and several lead holes 11 are set on right side plate 4 corresponding to spindle holes 21 on left side plate 3 for lead of LED lighting module to go through; right side plate 4 is in arc shape, exactly in circular arc shape. Grooves 30 are set on up and down ends at joint of front side plate 5 and right side plate 4 and on up and down ends at joint of back side plate 6 and right side plate 4.

The mentioned connecting piece 39 is hollow profile including subplate 31 and two bilateral symmetrical support plates 32 at both ends of subplate 31 that match with right side plate 4 and are used to support right side plate 4 and enable it to turn in support plate 32; holes 33 matching with lead holes on right side plate of frame are set on support plate 32 while subplate 31 and two support plates 32 form a cavity to hold lead; both top and bottom ends of support plate 32 are open with positioning slot along their own length direction and support rod 35 goes through it with both ends respectively connected with power source box 27 and end cap 29. End cap 29 mentioned above is the profile formed by several steel pipes after connection and is set with several screw mounting holes and holes to connect support rod.

The purpose to set grooves 30 on the front side plate 5 and back side plate 6 is as follows: when right side plate 4 turning in support plate 32, it will not be blocked by the top and bottom edges of support plate 32, and the turning angel of frame 1 can be adjusted by changing the width and depth of groove 30.

As shown in FIGS. 3, 4, 5, 11 and 12, frame positioning unit includes frame positioning plate 36 set on the outside of frame 1 and top of the frame positioning plate 36 is hinged with power source box 27 and end cap 29; in detail, top end of frame positioning plate 36 is set with a positioning spindle 40 and four parallel slots 37 are set from up to down on contact face between frame positioning plate 36 and left side plate 3 of frame, but the amount of slot is not limited to four and you can set it according to practical situation; the bigger the amount, the finer the adjustment. Slots_37 are set along horizontal direction, and; 1 strip 38 matching with slot 37 is set on left side plate 3 to lock strip 38 into slot 37.

As shown in FIGS. 11 and 12, when LED lighting module is mounted in frame, to adjust the angle of frame, we can turn over frame positioning plate 36 along the direction f arrow in FIG. 11 to break strip 38 away from slot 37, and turn frame for certain angle along the direction of arrow in FIG. 12; when angle is adjusted well, turn frame positioning plate 36 back to its initial position to lock strip 9 in corresponding slot 8 to locate frame. The adjustment is easy to be done. When adjustment is finished, to further fix frame positioning plate 36, both ends of frame positioning plate 36 can be set with mounting holes 41 through which screws 42 go to fix frame positioning plate 36 onto end cap 39 and power source box 27.

As shown in FIGS. 7 and 8, LED lighting module 2 consists of radiator unit 22 and heat conduction subplate 23 top of which is connected with radiator unit 22 and bottom of which is set with print circuit and several LED lamps 24; to improve the light concentration effect of LED lamp 24, it is optional to set lens on outer cover of LED lamp 24; radiator unit 22 includes baseplate 25 and top face of heat conduction subplate 23 is connected with bottom face of baseplate 25 top of which is set with several fins 26 side by side; fins 26 are set along the width direction of baseplate 25 and all of them are vertical to baseplate 25; fins 26 and baseplate 25 are made of aluminum; to further in favor of heat radiation, fins 26 and baseplate 25 are made from a single piece.

As shown in FIGS. 7, 9 and 13, fins 26 on both left and right ends of LED lighting module 2 are respectively set with circular ring 7 and bulb 9; the top and bottom ends on outer circumference of circular ring 7 are respectively set with a elastic convex tooth 8 which is made from a single piece together with circular ring_7 and both of them are made of rubber material; circular ring 7 is connected with module positioning unit; lead 10 is drawn out from bulb 9 and connects with all power sources of LED lamp 24. As shown in FIGS. 11 and 12, in left and right frames, leads 10 of two relative LED lighting modules 2 extends into the cavity of connecting piece 39 and are connected through a connector 43 which is connected with power source box 27.

Arc slots 12 are set on both up and down edges of right side plate 4 correspondingly in order to hold bulb 9 and enable it to turn in the slot; bulb 9 of LED lighting module 2 is set in the arc slot 12 mentioned before and lead 10 goes through the mentioned through-holes 11 and hole 33.

As shown in FIGS. 10, 11, 13 and 14, module positioning unit mentioned above includes a circular clamp ring 13 with the same inner diameter as the outer diameter of circular ring; there is a ledge 19 in middle part of clamp ring 13 and spindle nose 20 is set on the middle part of ledge 19 in spindle nose 20 on left side plate 3; the up and down ends of inner surface of clamp ring 13 are respectively set with a row of internal teeth 14; elastic convex teeth 8 are geared with the mentioned internal teeth 14; clamp ring 13 is connected with left side plate 3 through slide block and sliding rail, and the periphery of clamp ring 13 is fixed on left side plate 3; when big stress is laid between elastic convex teeth 8 and internal teeth 14, elastic convex teeth 8 can slide relative to internal teeth 14.

As shown in FIGS. 11 and 14, the detailed structures of the above mentioned slide block and sliding rail are as follows: the up and down ends on periphery of clamp ring 13 are set with sliding plates 15 parallel to each other on which raised slide block 16 is set; the internal side of left side plate 3 is set with cavity to hold clamp ring 13 and up and down ends of it are respectively set with 1 slide rail 18 in which the slide block 16 mentioned is set.

As shown in FIG. 1, after the above mentioned structure is assembled, to make the overall structure more beautiful, we can set top caps 44 on two support plates 32, shields 45 on frame 1 and connecting piece 39, and end cap box 46 out of end cap 29. 

1. A LED street lamp base comprising power source box(27) at front section, lamp holder(28) at middle section and end cap(29) at end section, wherein the lamp holder(28) mentioned above includes turnable frame(1) which is connected with frame positioning unit to limit rotation of frame and in which several LED lighting modules (2) are set side by side, and; LED lighting modules mentioned above can be turned to connect with frame (1) on which module positioning unit is mounted to limit the rotation of LED lighting module (2).
 2. The LED street lamp base according to claim 1, wherein the lamp holder(28) mentioned above consists of two frames bilateral symmetrical along the central line of lamp holder(28) and connecting piece (39) used to connect two frames (1); the front and back ends of connecting piece (39) are fixed and connected respectively with power source box (27) and end cap (29), and; inside of frame (1) can be turned to connect with connecting piece (39) while outside of frame (1) is connected to frame positioning unit.
 3. The LED street lamp base according to claim 2, wherein the frame(1) mentioned above consists of left side plate (3), right side plate (4) and front side plate (5) and back side plate (6) to connect left and right side plates; both ends of LED lighting module (2) is connected with the mentioned left side plate (3) and right side plate (4) through rotation; several bearing holes (21) are set on the top edge of left side plate (3) along the same line to mount LED lighting module while several holes are set on right side plate (4) corresponding to bearing holes on left side plate (3) for lead of LED lighting module to go through, and; right side plate (4) is of arc shape and the top and bottom ends at joint of front side plate (5) and right side plate (4) is open with grooves (30) the same as that at joint between back side plate (6) and right side plate (4); the connecting piece (39) is hollow profile including subplate (31) and two bilateral symmetrical support plates (32) at both ends of subplate (31) that match with right side plate (4) and are used to support right side plate (4) and enable it to turn in support plate (32); holes (33) matching with lead holes on right side plate of frame are set on support plate (32) while subplate (31) and two support plates (32) form a cavity to hold lead; both top and bottom ends of support plate (32) are open with positioning slot along their own length direction and support rod (35) goes through it with both ends respectively connected with power source box (27) and end cap (29).
 4. A LED street lamp base according to claim 1, wherein: the right end of LED lighting module (2) is set with bulb (9) from which lead (10) is drawn out; the left end of LED lighting module (2) is fixed with a circular ring (7) of which the top and bottom ends on outer circumference are respectively set with a elastic convex tooth (8) to connect module positioning unit.
 5. The LED street lamp base according to claim 4, wherein the module positioning unit includes clamp ring (13) that is socketed out of circular ring (7) and there is a ledge (19) in middle part of clamp ring (13) and spindle nose (20) is set on the middle part of ledge (19); the up and down ends of inner surface of clamp ring (13) are respectively set with a row of internal teeth (14); elastic convex teeth (8) are geared with the mentioned internal teeth (14); clamp ring (13) is connected with left side plate (3) through slide block and sliding rail, and the periphery of clamp ring (13) is fixed on left side plate (3); when big stress is laid between elastic convex teeth (8) and internal teeth (14), elastic convex teeth (8) can slide relative to internal teeth (14).
 6. The LED street lamp base according to claim 5, wherein the up and down ends on periphery of clamp ring (13) are set with sliding plates (15) parallel to each other on which raised slide block (16) is set; the internal side of left side plate (3) is set with cavity to hold clamp ring (13) and up and down ends of it are respectively set with a slide rail (18) in which the slide block (16) mentioned is set.
 7. The LED street lamp base according to claim 4, wherein arc slots (12) are set on both up and down edges of right side plate (4) correspondingly in order to hold bulb (9) and enable it to turn in the slot; bulb (9) of LED lighting module (2) is set in the arc slot (12) mentioned before and lead (10) goes through the mentioned through-hole (11) and hole (33).
 8. The LED street lamp base according to claim 4, wherein LED lighting module (2) consists of radiator unit (22) and heat conduction subplate (23) top of which is connected with radiator unit (22) and bottom of which is set with print circuit and several LED lamps (24); circular ring (7) and bulb (9) are respectively set on left and right end faces of radiator unit(22).
 9. The LED street lamp base according to claim 8, wherein radiator unit (22) includes baseplate (25) and top face of heat conduction subplate (23) is connected with bottom face of baseplate (25) top of which is set with several fins (26) side by side; fins (26) are set along the width direction of baseplate (25) and all of them are vertical to baseplate (25).
 10. The LED street lamp base according to claim 9, wherein fins (26) and baseplate (25) are made from a single piece.
 11. The LED street lamp base according to claim 9, wherein elastic convex tooth (8) is made from a single piece together with circular ring (7) and both of them are made of rubber material.
 12. The LED street lamp base according to claim 1, wherein frame positioning unit includes frame positioning plate (36) set on the outside of frame (1) and top of the frame positioning plate (36) is hinged with power source box (27) and end cap (29); end face on frame positioning plate (36) in touch with frame is set with several parallel slots (37) from up to down along horizontal direction, and; at least 1 strip (38) matching with slot (37) is set on end face of frame (1) in touch with frame positioning plate (36) to lock strip (38) into slot (37).
 13. The LED street lamp base according to claim 12, wherein frame (1) consists of left side plate (3), right side plate (4) and front (5) and back (6) side plates to connect front (5) and back (6) side plate; strip is set on left side plate (3).
 14. The LED street lamp base according to claim 13, wherein four parallel slots (37) are set on frame positioning plate (36) from up to down and 1 strip (38) is set on top end of left side plate (3). 